Place the Walnuts, kidney beans, mushrooms, soy and garlic granules in a food processor and blitz to give a coarse texture. Stir in the spring onions and season. Divide into 4 and mould into burger shapes.
Brush the burgers with a little oil and place on a BBQ or griddle pan and cook for 2 minutes each side.
Toast the buns on the BBQ or griddle pan until golden, top the base of the buns with lettuce and tomato and then add the burgers, finish with red onion and extra Walnuts adding the top half of the buns to serve.
Notes
Cook’s tip: Make the burgers ahead of time and chill until the BBQ is ready.0.82g salt per serving